Federal officials are moving forward with new regulations for managing the Colorado River, yet the seven states that share its waters remain at an impasse. Interior Secretary Doug Burgum held a virtual meeting with governors from the basin states, indicating the lack of progress made independently by the states.
The Colorado River is a crucial water source for approximately 40 million people across the American West. The existing guidelines for water allocation, which have been in place for the past two decades, are set to expire, prompting the need for new rules.
The negotiations have highlighted divisions between the Lower Basin states—Arizona, California, and Nevada—who are proposing mandatory cutbacks to align water demand with the river's actual supply.
Arizona faces the most significant risk under the current framework, with potential cuts to its Colorado River allocation reaching up to 77 percent due to its junior priority rights compared to California. This precarious situation is compounded by internal disputes within Arizona itself.
Cities that rely on the Central Arizona Project canal are seeking clarity regarding the distribution of Colorado River water that has been stored underground over the years by the Arizona Water Banking Authority. The disagreement centers on how this underground water pool should be allocated, particularly affecting the rapidly growing suburbs that initially banked the water.
Additionally, a state judge ruled earlier in 2026 that the Arizona Department of Water Resources had unlawfully altered its evaluation process for determining the availability of groundwater necessary for new home construction in parts of the Valley. This ruling has direct implications for the approval of new subdivisions.
Water banking, while less familiar to many, plays a critical role in the suburbs. Arizona has historically stored surplus Colorado River water underground to create a reserve for times of shortage, which is now under negotiation. The current dispute involves the terms for withdrawing this stored water and establishing priority for its use.